Kongen Marina Sauna is a glass-dome sauna on a raft beside the restaurant terrace at Kongen Marina on Frognerstranda, with a view across the Oslofjord. It is open every day, year-round, and runs at 90–100 °C. A shared session takes up to ten guests, and drop-in is possible if there is room; private hire takes up to twelve. Everyone must shower and wear swimwear in the sauna. A unisex changing room with a cold shower is in the pink annex on the raft, and drinks are served from the restaurant.